Will not turn over

[patrick4266]

We finally have a nice day here in st louis so I thought I would work on the boat. I had changed the impeller on my 1972-85 hp rude. Then I rebuilt the carbs. This is the first time I have tried to start it. Now it will no turn over. I ran a hot wire to the selonoid , nothing , changed selonids same thing, The fuse is good, battery is up can jump it if I go straight to the main starter wire. I even disconnected both selonoids wires in case it had a neuteral saftey switch and I can not figured it out. now I am perplexed , confused, ect.

 

[JB]

Re: Will not turn over

A little confused, Patrick.

If you jump +12V to the starter the starter turns over. Right?

If you jump +12V to the solenoid operating terminal it clicks but the starter does not work. Right?

Disconnect all high current cables from where ever they are. Clean the terminals and the cable ends and reconnect. I think you have a poor connection.

 

[R.Johnson]

Re: Will not turn over

If you disconnected both wires from the solinoid, one wire has to go to ground. Then twelve volts to the other terminal should trip the solinoid.

 

[patrick4266]

Re: Will not turn over

I just got back in and you were right the selonoid was not grounded for some reason so if I ground one wire it will turn over but not with the key I have to run a hot wire to one of the ternimals and ground the other one out. still will not start, acts like it is not getting any fire. When I reconnected the electric shift wires I made sure to do that right. It must be something I did as it was running fine before I took off the lower end and rebuilt the carbs.

 

[ezeke]

Re: Will not turn over

And you do have a safety switch at the engine on the 1972 model; your ground wire from the small post on the solenoid goes to/through it. Check for positive voltage on the second small post coming from the ignition switch when you turn to start.

 

[patrick4266]

Re: Will not turn over

I went out and checked the ignition switch. Two hot all the time, One hot when I turn the key and the other one dead. It is probaly a ground. I have the manual so I will go through it in a bit but I cannot work on the boat untill tomorrow or sunday. I still think it is something I did but I cannot not figure out what as the electric shift only has two wires and they are colered and cannot be confused.

 

[patrick4266]

Re: Will not turn over

Did you mean the second small post on the selonoid? I checked at the ignitiong switch. Now after rereading your post I think you meant at the selonoid.

 

[ezeke]

Re: Will not turn over

The positive current goes from the large post where the positive battery cable should be attached on the solenoid, through the fuse to the harness, then to the ignition switch.

When you turn the switch to start, positive current is fed back to the small post on the solenoid, activating and closing the magnet that joins and close the circuit between the two large posts on the solenoid. This allows the full 12 volts to feed through the solenoid, directly to the starter.

If the other small post wire, which leads to ground, is not grounded, then nothing happens.

 

[patrick4266]

Re: Will not turn over

thanks i will check it out in the morning.

 

[patrick4266]

Re: Will not turn over

Fixed it. It was another "simple mistake". I thought it had to be something I did when i took off the lower unit As these were the only wires I disconnected, so i got "tunnel vision" on that. However I did take off and rebuild the carbs. After reading what Ezeke said about the safety switch I started thinking about that. I read my manual about the switch,I went and looked at my other motor,I have two of them, on two different boats. What I had did was got in a hurry and installed the throttle cable wrong to where it was pushing forward too much and not allowing the safety swtich to engage. I will try to start in later but I did bump the key and it turns over

 

[patrick4266]

Re: Will not turn over

Well I started it up, No problem there, however it seems to have a miss and it did not have it before. I had my carbs of of my 1970 on it and it ran fine , now not as good.

 

[HighTrim]

Re: Will not turn over

Patrick for the miss start at simple things.

Check for loose conections and leads grounding out at the PP, all coils and key switch. Then check for arcing around the coils again, PP, 10 way connector, and in the key switch.

Also ensure your plugs are torqued to spec.

 

[ezeke]

Re: Will not turn over

Go over your fuel connections again and all of the gaskets. You probably have a little air leak somewhere. Be sure the fuel pump is clamped tight.

 

[patrick4266]

Re: Will not turn over

Well, I checked this and i checked that, finally I pulled my plugs and they seem to be very wet. It does start right up so I do not think it is flooding but I am thinking maybe I did not adjust the floats right although, I have rebuilt many a carbs, "automotive" I did watch the carb rebuild video and followed the manual. I hate to have to pull them back off. On my 1970 carbs there is adjustment nozzles but I can not find any on the 72.

 

[ezeke]

Re: Will not turn over

It's all fixed jet so there are no adjustment internally on the carburetors. You could make a visual check that the throttle plates are fully opened and synchronized, and that the chokes are fully opened once the engine gets to 100 degrees +/-.

That's one of the engines that had the thermal switch partly controlling the choke solenoid. Most of them were disconnected by the dealership's service departments in the 1970's, but if yours is still hooked up, it can cause problems. Look up by the lifting eye and see if the lead is still there.

 

[patrick4266]

Re: Will not turn over

Thanks I will check that out in a min.

 

[patrick4266]

Re: Will not turn over

I looked and cannot figure out excactly where it is.

 

[ezeke]

Re: Will not turn over

Trace all of the wires from the choke solenoid. One should go to ground. If there is only one other wire, or if two go to the same post on the terminal block, then the solenoid is controlled by the switch at the remote control or console and there is no concern.

 

[patrick4266]

Re: Will not turn over

Today i took the carbs back off, reset the floats and double checked everything. It still has a miss, sounds like it may be hitting on three cylinders. After I pull off the plug wires and make sure they are alll firing, I guess tomorrow I will buy some new plugs and try that.